Improvement in coal-oil heaters



H. W. DOPP.

Coal Oil Heater.

Patented July 7, 1863.

I e W60 r: //zelm N PETERS. Phomulhngmphe UNITED STATES PATENT OFFICE.

H. W. DOPP, OF BUFFALO, NEW YORK.

IMPROVEMENT IN COAL-OIL HEATERS.

Specification forming part of Letters Patent No. 39,129, dated July 7, 1863.

To all whom fit may concern:

Be it known that I, H. W. DOPP, of the city of Buffalo, county of Erie, and State of New Yorlt,haveinvented anew and Improved Mode of Burning Goal-Oil or Petroleum for Heating and Cooking Purposes; and I do hereby declare that the following is a full and exact de` scription thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

A is a distributingplate, perforated but having in its center an adjustable disk, a, by which the vapor is arrested in order to be burned, and by which the proper amount of atmosphere to be mingled with any given quantity of vapor is regulated, sufcient heat being obtained from the combustion of said vapor to secure continuous vaporization.

B B B are conductors carrying heat from distributing-plate A to retort C.

C is a retort, in which the oil is converted into vapor by means of the heat conducted down from distributing-plate A. This retort is furnished with a small orifice, b, in the ceuter of its top surface, through which the vapor to be burned makes its exit.

cis a rod within the retort, pointed on the upper end for graduating purposes, and secured at the lower end to a stem. It is operated by means of a crankpin playing into a groove running across said stem at c I.

D is a supply-tube leading oil into retort O.

E is a shaft, provided with a crank-pin on one end and a square pin on the other end. This shaft runs through the center of supplytube D, and serves as motion-transferrator to the stem and rod c.

F is a throttle-yI alve body, which is attached to supply-tube D.

G is a stem with a handle on one end and a square hole in the-center of the other en d,

by means of which connection is had with shaft E and rod c, the whole being for graduating the supply ot' vapor to be burned.

g is a throttle-screw or screw-valve for controlling the supply of oil to retort.

H is a screw-valve placed in the bottom part of retort C for withdrawing the residuum of the oil.

I is a cup surrounding the retort for holding alcohol, the combustion of which in that mode is best adapted to produce the primary vaporization of the oil within the retort.

To operate this heating and cooking apparatus a reservoir of coil-oil or petroleum is placed in connection with it, by means of ordinary tubing, at an altitude of three or more feet, and leadin gto the throttle-valve F. Sufficient heat is then to be applied to retort O and distributing-plate A by means of the combustion of the alcohol in cup I, surrounding the retort, to produce vaporization, which is ascertained by first opening the throttle-screwr or screw-valve g to admit the oil into the retort C, and then partially opening the small orifice in the upper surface of said retort C at about the time the alcohol is nearly consumed, by the partial withdrawal of the pointed rod c, which is done by slightly turning the handle ot' stem G. If vaporization is accomplished the vapor will then issue from the small oriiice thus partially opened. This vapor as it rises mingles with the atmosphere to the ex tent permitted by the position of the adjusta ble disk a, and is ignited beneath said disk a and the distributing-plate A by coming in contact with the flame of the burning alcohol in cup I, and then burns with great rapidity and power, free from smell and smoke. The plate A thus becomes thoroughly heated by the action of the burning vapor immediately beneath it, and conducts sufficient heat now to the conductors B B B and retort O to keep up a steady supply of vapor, and now the rod c is fully Withdrawn by further turning the handle of stem G, when increased production and consumption of vapor is at the same time ef fected by the self-sustaining process of vaporization in the mode above described.

1. The adjustable small disk a, in combination with the perforated distributing-plate A., [or the purpose as set forth.

2. The mode of vaporizing coal-oil of any gravity, or other hydrocarbon liquids, for heating and cooking purposes, by means of a retort without wicking or packing of any kind or form, so arranged that the supply of oil enters into the retort below the point of vaporization, as described.

3. The combination of retort C and drawoff valve H, for the purpose described.

H. WVM. BOPP.

Witnesses:

J. FoRsYTH, THEoDoRE MEYER. 

